车辆组合导航定位技术

介绍车辆导航定位及其组合导航定位技术.组合导航利用现代信息融合技术,实现对车辆组合导航的准确定位,具有全方位、全天候、自主式定位功能.着重研究了GPS/GLNOASS/MM和GPS/DR/MM三组合导航定位及跑车试验分析.跑车试验表明,车辆组合导航定位精度及可靠性比单独GPS导航定位有所提高,车辆运行效率和安全性大大改善,提高了通行能力,有效地缓解了交通拥挤状况,从而为实现交通管理"自动化"以及车辆行驶"智能化"提供了可靠的保证.     

Decentralized Bezout Identity and a Parametrization of Decentralized Controllers for Singular Systems

1　 IntroductionConsider a singular decentralized control system of the formEx(t) =Ax(t) ∑Ni=1Biui(t)yi =Cix(t) ,i∈ N ={ 1 ,2 ,… ,N}(1 )where x(t)∈ Rn is the state vector,ui(t)∈ Rmi and yi(t)∈ Rpi are respectively the localcontrol input and measure outputvectors of the ith control channel.The matrix E may besingular,i.e.,rank(E) 相似文献   

The Optimum Model and Its Decision Support System of Coal Quality Balance

1　 Coal Quality Balance and Its Significance[1]Coal quality balance is to make a comprehensive plan concerning excavation steps and coalamount disposition of different coal seams based upon the natural coal-preservation stateand its relation with mining engineering in the three dimensional space so as to have thequality of coal excavated from different districts blended and coordinated the greatestextent possible and ensure the coal quality uniformity and stability,thus raise economicand soc…     

Study on the Investment Behavior under Transaction Cost in Futures Market

1　IntroductionAfter10yearsdevelopment,thestockmarketsofchinaarewaitingtoseestock-indexfu-turesinthenewcentury.Itisofgreatimportantforbothsmallinvestorsandlargeinvest-menthousestoadjusttheirbehaviorincasetheyenterintomarketswithnewinstruments.Inrecentyears,speculatingwithfutureswasdiscussedinsomepapers[1～4],andtheresultsachievedroutinelyholdtheassumptionsasnotransactioncosts(TC),nodifferentbetweenborrowingandlandingrates,andalltradingprofitsbeingsubjecttothesametaxrate.Themainproblemisthatne…     

Primary Structural and Quantitative Analysis of Infeasible Solution to Job shop Scheduling Problem

1　IntroductionTheJobShopSchedulingProblemisawell-knownNP-hardproblem,whichattractslotsofmathematiciansallovertheworldspendingmuchtimeandenergyinthisfield.Uptonowtherearemanyefficientheuristicalgorithms,whichhadalreadybeendeveloped,buttheinfeasiblesolutioncertainlypossessesthemajorityofsearchspacewhichhasinfluencedtheefficiencyofthesealgorithms.Atthemoment,noonehasbeenfoundtobededicatingtothequantitativeanalysisoftheinfeasiblesolutionproblem.InthispaperthestructureofinfeasiblesolutiontoJSS…     

Macro-economic Model and Its H_∞ Control Strategies for Liaoning Province

1　ＩｎｔｒｏｄｕｃｔｉｏｎＣｏｎｓｉｄｅｒａｂｌｅｒｅｓｅａｒｃｈｅｓｈａｖｅｂｅｅｎｍａｄｅｏｎｍａｃｒｏｅｃｏｎｏｍｉｃｍｏｄｅｌｓｔｉｌｌｎｏｗ .Ｐｏｌｉｃｙｍａｋｅｒｓｕｓｕ ａｌｌｙｐｒｅｄｉｃｔａｎｄａｎａｌｙｚｅｅｃｏｎｏｍｉｃｓｉｔｕａｔｉｏｎ ,ｍａｋｅｅｃｏｎｏｍｉｃｄｅｃｉｓｉｏｎｓｂａｓｅｄｏｎｔｈｅｓｅｍｏｄｅｌｓ[1] .Ｔｅｃｈｎｉｑｕｅｓｕｓｅｄｉｎｄｅｃｉｓｉｏｎｐｒｏｂｌｅｍａｎｄｒｉｓｋｍａｎａｇｅｍｅｎｔｕｓｕａｌｌｙａｒｅｏｐｔｉｍａｌｒｅｇｕｌａｔｏｒｔｈｅ…     

The System Dynamics (SD) is used for researching on battle simulation

1　ＩｎｔｒｏｄｕｃｔｉｏｎＩｎ 1 95 6 ,ｔｈｅＳｙｓｔｅｍＤｙｎａｍｉｃｓ (ＳＤ)ｗａｓｓｅｔｕｐｂｙＰｒｏｆｅｓｓｏｒＪａｙ .Ｗ .Ｆｏｒｒｅｓｔｅｒ,ｗｈｏｗｏｒｋｅｄｉｎＡｍｅｒｉｃａＭａｓｓａｃｈｕｓｅｔｔｓＩｎｓｔｉｔｕｔｅｏｆｔｅｃｈｎｏｌｏｇｙ .ＡｎｄＳＤｗａｓｄｅｎｏｍｉｎａｔｅｄａｓ″ｓｔｒａｔｅｇｉｃａｎｄｓｔｒａｔａｇｅｍｌａｂｏｒａｔｏｒｙ″ .ＳＤｕｎｄｅｒｓｔａｎｄ ,ｔｈａｔｓｙｓｔｅｍａｔｉｃａｃｔｉｏｎｍｏｄｅａｎｄｍａｉｎｐｅｃｕｌｉａｒｉｔｙｇｏｖｅｒｎｂｙｉｔ′ｓ…     

The Entropy of System Decreases with the Deflection from the Equiprobability Distribution

1　IntroductionEntropy,asameasurementthatdescribestheuncertaintyofsubsystemsdistributioninasystem,hasdevelopedunceasingly.First,R.J.E.Clausiusintroduceditintothermodynamics,asastatefunction,todescribetheauto-evolutionabilityofthestate.Thedifferenceofentropybetweenthetwostatesequalstothequantityofheatabsorbedbythesysteminanisothermalprocess,thatisS2-S1=∫21dQT(1)　　L.E.Boltzmannconnecteditwiththeuncertaintyofsubsystemsdistributioninathermodynamicalsystem.Theentropyofathermodynamicalsystem…     

Knowledge-based bridge detection from SAR images

Automatic bridge detection is an important application of SAR images. Differed from the classical CFAR method, a new knowledge-based bridge detection approach is proposed. The method not only uses the backscattering intensity difference between targets and background but also applies the contextual information and spatial relationship between objects. According to bridges’ special characteristics and scattering properties in SAR images, the new knowledge-based method includes three processes: river segmentation, potential bridge areas detection and bridge discrimination. The application to AIRSAR data shows that the new method is not sensitive to rivers’ shape. Moreover, this method can detect bridges successfully when river segmentation is not very exact and is more robust than the radius projection method.     

Performance comparison of distributed state estimation algorithms for power systems

A newly proposed distributed dynamic state estimation algorithm based on the maximum a posteriori (MAP) technique is generalised and studied for power systems. The system model involves linear time-varying load dynamics and nonlinear measurements. The main contribution of this paper is to compare the performance and feasibility of this distributed algorithm with several existing distributed state estimation algorithms in the literature. Simulations are tested on the IEEE 39-bus and 118-bus systems under various operating conditions. The results show that this distributed algorithm performs better than distributed quasi-steady state estimation algorithms which do not use the load dynamic model. The results also show that the performance of this distributed method is very close to that by the centralized state estimation method. The merits of this algorithm over the centralized method lie in its low computational complexity and low communication load. Hence, the analysis supports the efficiency and benefits of the distributed algorithm in applications to large-scale power systems.